mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-30 12:43:41 +01:00
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
|
/** @file
|
||
|
|
MM CPU I/O 2 protocol as defined in the PI 1.5 specification.
|
||
|
|
|
||
|
|
This protocol provides CPU I/O and memory access within MM.
|
||
|
|
|
||
|
|
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#ifndef _MM_CPU_IO_H_
|
||
|
|
#define _MM_CPU_IO_H_
|
||
|
|
|
||
|
|
#define EFI_MM_CPU_IO_PROTOCOL_GUID \
|
||
|
|
{ \
|
||
|
|
0x3242A9D8, 0xCE70, 0x4AA0, { 0x95, 0x5D, 0x5E, 0x7B, 0x14, 0x0D, 0xE4, 0xD2 } \
|
||
|
|
}
|
||
|
|
|
||
|
|
typedef struct _EFI_MM_CPU_IO_PROTOCOL EFI_MM_CPU_IO_PROTOCOL;
|
||
|
|
|
||
|
|
///
|
||
|
|
/// Width of the MM CPU I/O operations
|
||
|
|
///
|
||
|
|
typedef enum {
|
||
|
|
MM_IO_UINT8 = 0,
|
||
|
|
MM_IO_UINT16 = 1,
|
||
|
|
MM_IO_UINT32 = 2,
|
||
|
|
MM_IO_UINT64 = 3
|
||
|
|
} EFI_MM_IO_WIDTH;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Provides the basic memory and I/O interfaces used toabstract accesses to devices.
|
||
|
|
|
||
|
|
The I/O operations are carried out exactly as requested. The caller is
|
||
|
|
responsible for any alignment and I/O width issues that the bus, device,
|
||
|
|
platform, or type of I/O might require.
|
||
|
|
|
||
|
|
@param[in] This The EFI_MM_CPU_IO_PROTOCOL instance.
|
||
|
|
@param[in] Width Signifies the width of the I/O operations.
|
||
|
|
@param[in] Address The base address of the I/O operations. The caller is
|
||
|
|
responsible for aligning the Address if required.
|
||
|
|
@param[in] Count The number of I/O operations to perform.
|
||
|
|
@param[in,out] Buffer For read operations, the destination buffer to store
|
||
|
|
the results. For write operations, the source buffer
|
||
|
|
from which to write data.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The data was read from or written to the device.
|
||
|
|
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
||
|
|
@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
|
||
|
|
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
|
||
|
|
of resources.
|
||
|
|
**/
|
||
|
|
typedef
|
||
|
|
EFI_STATUS
|
||
|
|
(EFIAPI *EFI_MM_CPU_IO)(
|
||
|
|
IN CONST EFI_MM_CPU_IO_PROTOCOL *This,
|
||
|
|
IN EFI_MM_IO_WIDTH Width,
|
||
|
|
IN UINT64 Address,
|
||
|
|
IN UINTN Count,
|
||
|
|
IN OUT VOID *Buffer
|
||
|
|
);
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
///
|
||
|
|
/// This service provides the various modalities of memory and I/O read.
|
||
|
|
///
|
||
|
|
EFI_MM_CPU_IO Read;
|
||
|
|
///
|
||
|
|
/// This service provides the various modalities of memory and I/O write.
|
||
|
|
///
|
||
|
|
EFI_MM_CPU_IO Write;
|
||
|
|
} EFI_MM_IO_ACCESS;
|
||
|
|
|
||
|
|
///
|
||
|
|
/// MM CPU I/O Protocol provides CPU I/O and memory access within MM.
|
||
|
|
///
|
||
|
|
struct _EFI_MM_CPU_IO_PROTOCOL {
|
||
|
|
///
|
||
|
|
/// Allows reads and writes to memory-mapped I/O space.
|
||
|
|
///
|
||
|
|
EFI_MM_IO_ACCESS Mem;
|
||
|
|
///
|
||
|
|
/// Allows reads and writes to I/O space.
|
||
|
|
///
|
||
|
|
EFI_MM_IO_ACCESS Io;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern EFI_GUID gEfiMmCpuIoProtocolGuid;
|
||
|
|
|
||
|
|
#endif
|